Fix diagnostic log format

pkgs/anisette-v3-server/log-provisioning-error.patch

@@ -6,6 +6,6 @@
  			log.info("Provisioning done!");
 -		} catch (Exception) {}
 +		} catch (Exception e) {
-+			log.error("Provisioning failed: %s", e.msg);
++			log.error("Provisioning failed: {}", e.msg);
 +		}
  	}